Giant danio tank mates
An 11 cm fast schooling danio that needs real swim space. Beautiful in a large group in a long tank, and disruptive and stressful in anything under 150 cm.
Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.
Best tank mates (on file)
Merged from conservative safest and best with fields — de-duplicated by species.
The Giant danio profile lists Bala / silver shark as both safe and a recommended pairing. Bala / silver shark schools in groups of 5 or more, so plan room for the whole group rather than one fish. Bala / silver shark grows bigger than Giant danio (35cm vs 11cm). Stock the Giant danio group large enough to outnumber the Bala / silver shark, or the smaller fish ends up bullied or off food.
The Giant danio profile lists Boesemani Rainbowfish as both safe and a recommended pairing. Boesemani Rainbowfish schools in groups of 6 or more, so plan room for the whole group rather than one fish.
The Giant danio profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish. Corydoras Catfish swims in the bottom zone while Giant danio stays in the middle, so the two will not crowd the same water column.
The Giant danio profile lists Denison's / red-line torpedo barb as both safe and a recommended pairing. Denison's / red-line torpedo barb schools in groups of 6 or more, so plan room for the whole group rather than one fish.
Risky or situational
From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.
Temperature ranges barely overlap between the two, so one species ends up living at the edge of its comfort window. Run the pair checker before stocking.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.
Betta is rated semi-aggressive, so expect chasing, fin damage, or display behaviour directed at Giant danio. Run the pair checker before stocking.
Listed under broad avoid-with planning on the profile. The pair page covers what makes it situational.
Fish to avoid with Giant danio
From the unsafe list — predation, aggression, or space rules on this profile.
Giant danio is flagged as predatory or as likely to eat small fish, and Ember Tetra at 2cm is well within an adult Giant danio's gape.
Giant danio is flagged as predatory or as likely to eat small fish, and Chili Rasbora at 2cm is well within an adult Giant danio's gape.
Giant danio is flagged as predatory or as likely to eat small fish, and Pea Puffer at 3cm is well within an adult Giant danio's gape.
Tank size and groups
- Published minimum for Giant danio: 200L — group minimum 6 (schooling).
- Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
- Nearest litre hub to this minimum: 200L hub.
Easier alternatives to consider
Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.
Plan before you buy
Pair checks for every mix, then multi-species stocking in the builder.
Filtration & heating
A 200L minimum tank for Giant danio needs a filter rated for at least 800L/hr turnover and a heater maintaining 18–26°C.
Similar fish (same category)
- Rainbow / red-tailed black shark — min 200L
- Rosy Barb — min 180L
- Denison's / red-line torpedo barb — min 250L
- Denisons Barb — min 250L
- Scissortail Rasbora — min 150L
- Gold / Chinese barb — min 120L
- Odessa Barb — min 120L
- Banded leporinus — min 300L
Other species that list Giant danio
Reverse lookup: these profiles reference Giant danio under safe or “best with” lists.